Book/Report

FZJ-2018-03296

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Beitrag zur Phasenkinetik in neuen Superlegierungen

Weisbrodt, A. (Corresponding author)FZJ* ; Penkalla, H.-J.FZJ* ; Schubert, F.FZJ* ; Nickel, H.FZJ*

1990
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/18778

Report No.: Juel-2377

Abstract: At the development of new ODS ($\textbf{O}$xide-$\textbf{D}$ispersion-$\textbf{S}$trengthened) alloys for components being exposed to hot-gas temperatures nickel-base alloys and ODS alloys have been investigated. The experimental work mainly referred to phase investigations of thermally loaded samples. The addition of alloying elements will have an decisive influence on the $\gamma$'-phase fraction, $\gamma$'-lattice parameter, the morphology as well as the coarsening behaviour of the $\gamma$'-phase under temperature load. The main characteristics of ODS alloys are Y,Al-mixed oxides and microstructural inhomogenities. As for MA6000 a Time-Temperature-Precipitation diagram has been elaborated. By means of the improved computer programme $\textit{PHASCALC}$ for phase and N$_{y}$ (= average electron vacancy concentration) -value calculation many microstructural parameters such as the $\gamma$/$\gamma$'-misfit, the solution of the $\gamma$'-phase and melting temperatures can be determined. Tensile tests made at temperatures above 900°C have shown that the strengthening parameters are dependent on alloy composition, temperature conditions, $\gamma$'-phase fraction and oxide dispersion content.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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